i'm barack obama and i arove this message. some of our children's greatest experiences have been in the smaller classrooms. vo: but mitt romney says class sizes don't matter... and he supports paul ryan's budget which could cut education by 20%. you can't do this by shoving 30, 35 people into a class and just teaching to some test... these are all issues that really he personally cannot relate to. to be able to afford an education, to want the very best public education system for your children. we're sitting on a bunch of shale gas. there's natural gas under my town. it's a game changer. ♪ ♪ it means cleaner, cheaper american-made energy. but we've got to be careful how we get it. design the wells to be safe. thousands of jobs. use the mostst advanced technology to protect our water. billions in the economy. at chevron, if we can't do it right, we won't do it at all. we've got to think long term. we've got to think long term. ♪ ♪ [ romney ] my plan is to help the middle class. trade has to work for america. that means